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|Title: ||481: Effects of surface features on thunderstorm activity- a preliminary study for Lisbon region.|
|Authors: ||Carraça, M. G. D.|
Alcoforado, M. J.
|Keywords: ||urban climate|
|Issue Date: ||2012|
|Publisher: ||Proceedings of the ICUC8–8th International Conference on Urban Climates, 6-10 August 2012, UCD, Dublin, Ireland.|
|Abstract: ||In this paper some preliminary results of a study on the influence of surface features on
convective precipitation and thunderstorm activity in the region of Lisbon (Portugal) are
presented and discussed. The present work focuses on a case study - the strong
thunderstorms affecting Lisbon on the 9th September 2009.
The spatial distributions of precipitation and cloud-to-ground discharges (CGD) are
investigated in relation to land surface characteristics, orographic features and other
geographical factors. The spatial distributions of thunderstorm activity are also compared
with the fields of surface turbulent heat fluxes, derived from satellite data. The datasets have
been integrated in a Geographical Information System (GIS) in order to facilitate a
georeferenced data analysis.
The analysis of modelled and observational data indicates a more intense thunderstorm
activity over the Lisbon metropolitan region than on the surrounding areas during this
The present work results suggest that the study of the influence of Lisbon urban area on
convective precipitation and thunderstorm activity deserves further investigation. More
events should be analysed in order to understand the relative importance of Lisbon urban
surface on atmospheric convective phenomena. The lack of more adequate observational
and modelled data was an important constraint for this work. However, we expect that data
with higher spatial and temporal resolution will become available.|
|Appears in Collections:||FIS - Artigos em Livros de Actas/Proceedings|
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